Shaft cutting and centering machine



5 Sheets-Sheet l H. N. BANEY ETAL SHAFT CUTTING AND CENTERING MACHINEMarch 31, 1953 Filed Dec. 26, 1946 March 3l, 1953 H, N. BANEY ETAL2,633,039

. SHAFT CUTTING AND CENTERING MACHINE Filed Deo. 26, 1946 5 Sheets-Sheet3 "MQZMM `Patented Mar. 31, 1953 na s.

2,633,039 `SHAFT CUTTING AND CENTERING MACHINE Harry Noble Baney, LouisAllen Copper Slentz, t

and Arlo Almeron Kirkpatrick, Muncie, Ind., assignors to Borg-WarnerCorporation,"Chi-" cago, Ill., acorporation of Illinois ApplicationDecember 26, i946, Serial No. 718,366

The present invention relates to a shaft cutting andoentering machine.The general object of Athe invention is to provide a machine forcuttingv and centering the ends of shafts.

Heretofore, shaft cutting and centering ma? chineshave featured a singlehandle adapted to be manually actuated to simultaneously advance thecutting and centering tools at opposite ends ofthe shaft into engagementtherewith to cut and center the two endsof 'the shaft at the same timeand to simultaneously retract the tools fromv the ends `of the shaft.Due to the difculty of accurately cutting the shaft to a predetermineddesired length prior` to the cutting and centering operation andthereafter locating the shaft with each end exactly' the same distancefrom the adjacent tools, there is, in` general, a different amount ofcutting to beaccomplished on both ends of the shaft. MachinesA operatedin this manner and for this reason are unsatisfactory as one ofthetoolsusually completes its full cutting and'centering stroke before theother tool' kand thereafter rubs onthe finished end of the shaft whilethe other tool is completing the cutting and centering of the other endof the shaft. In such case, the rubbing action of the one tool on theend of a shaft, due Ltorthe metal or compound of which the cutting toolsare formed, exerts an abrasive action on the finished end of the shaftsuiiicient to shorten the desired length of the shaft and therebyimpairs the utility of the shaft for its intended purpose when the shaftis incorporated in a mechanism, such as an automobile transmission inwhich axial movement of the shaft is Another Aobject of the invention isto provide a machine for cutting and centering the ends of shafts andincorporating means for independently moving the cutting and centeringtools into and out of engagement with the ends of the shaft whereby onetool may be operatedto cut and centerthe associated shaft end and bewithdrawn while the other tool continues operating on the other shaftend.

4ilnotherobject of the invention isA to provide" afmachinefor thepurpose above describedin'- corporatlng dual control means forindependently actuating the cutting and centering'tools.

4 Claims. (Cl. W7-21) 2 A further object of the invention is to providea machine of the type described featuring control means for the powermeans actuating the cutting and centering tools adapted to effectoperation of the power means to move the tools quickly to cuttingposition and' thereafter slowly into cutting l engagement withthe endsof the shaft.

Another object of the invention is to providey a machine of the typedescribed wherein hydraulic power means is utilized to advance and.:

retract the tools to and from cutting engagement with the ends of theshaft and control meansfor the power means are provided to advanceandretract the tools independently of eachother and;

at the will of the operator.

A different lobject-of the inventicnis tomovide a machine of the typedescribed having power means for locating the shaft in a predef terminedposition between the cutting tools prior; tothe cutting operation and4means for operating' the power-'means to move the same out of locatingposition duringfactuation of the tools to theircutting position. y

Other objects, aims and advantages of the'iinj provements that arecontemplated herein will bef apparent to persons skilled in the/artafter the construction andA operation of the cutting and centeringmachine is understood from the within description.

It is preferred to accomplish the numerous ob-'' jects of this inventionand' to practice the same in substantially the manner hereinafter fullyde` scribed and as more'particularly pointed out in the appended claims.Reference is now made to the accompanying drawings which form of thisspecification wherein:

Fig. 1 is a longitudinal side elevation of abut? ting and centeringmachine showing instrumen-` talities of the present inventionincorporated therein; I

Fig. 2 is a top plan view of the machine shown in Fig. 1;

heads of the machine;

Fig. 4 is another transverse vertical section. taken on lthe plane ofline 4 4 of Figi, looking' in the direction of the arrows or toward theshaftsupporting portion of the machine;

Fig. 5 is a side elevation of the speed-'con-Y trolling mechanism forthe tool head shown in Fig. 3 and taken on the plane indicated by line-5-5 of Fig. 3; and

Fig. Sais a diagrammatic view, partly insee-j4 tion, of the hydraulicsystem.

a' part;

the y i l i the table 2, if desired, they are normally maintained infixed spaced relationship to each other and to the adjacent headstocks 4and 5 by clamping pieces or yokes associated therewith such as theyoke58a shown in Fig. 4 which engages the shoulders |8 and I| of thewalls 3 and 3a of the table2 and secures the slides 58 thereto by theclamping action obtainedV by bolts 58h.

The slides 58 and 59 are provided with longitudinal ways 60 and 6|, eachWay slidably receiving a pair of gripping jaws of an equalizing vise forpermitting movement of the same in a direction transverse to themovement of the headstock to position the axis of the shaft in alignmentwithvgnthe tools38 and 41 for thecutting and centering Operation. Asclearly shown in Figs. 2 and 4, the jaw members 62 and 63 of theequalizing vise, generally designated 64, are of inverted T-shapeddesign in end elevation and are provided with bases 65 and 66 recessedwithin theway 68 of the slide 58 and the jaw members 61 and 68 of theequalizing vise indicated at 69 are of similar design providing bases 18and 1I` 61 being movable to positions to center the shaft' with respectto the tools 30 and 48 for axial alignment therewith, whereupon the jaws62 and 61 maybe secured by means of bolts 12 and 13,

received Within slots in the jaws, to the ,slides` 58`and 59 whereuponthe other jaws 63 and 68 of the respective vises may be brought intoengagement with the shaft by the threaded shaftsm14 and 15 threadedinend walls of the slides 58 and 59 and rotatable by means of the handAwheels V18 and 19 fixed to the respective shafts for rotating the same.It will be apparent from this description of the vises 58 and 18 thatthe same are capableof locating the shaft I in axial alignment with thecutting and centering tools 38 and 48 for operation of the toolsthereon.

` In the embodiment of the invention shown in the drawings, means areprovided for locating the shaft I in a predetermined spaced relationshipbetween the cutting tools 38 and 48 so that the endsY of the shaft will`be positioned substantially equidistant from the cutting tools. To thisend, a plate A88 on the slide 58` is alxed to the top thereof and at oneside of the equalizing vise jaw 62, by bolts 8| and 82. The plate hassecured thereto a cylinder 83 by any Ysuitable means and having a piston84 therein actuated by fluid pressure as hereinafter described andconnected Aby a' piston rod 85 and coupling 86 to a locating bar81Which, as shown in Figs. 2 and 4, is adapted to slidably extendthrough an elongate ,opening 88 in a guide block 89, having a retainingplate 98 secured thereto, and into the path of the shaftY for engagementWithlthe left end of the shaft to thereby locate the ends of the shaftequidis-` tant from the cutting tools 38 and 48, as shown in Figs. l and2. -The chucks I5 and 41 of the headstocks 4 and `5, respectively, aremovable into Vand out of engagement with opposite ends of the shaft IVby the gear and rack mechanisms previously- 'described which areoperated by the pistons 45 source such as the motor 9| is utilized todrive a pump 92 which draws fluid from a sump 93 through a pipe 94 andpumps the fluid under` pressure into a conduit 95 connected to branchconduits 96 and 91 respectively leading to valves generally indicated98` and 99 vof two-Way valve design controlling the pressure fluid toeffect movement of the tools into and out of`cutting` engagement withthe ends of the shaft, as well as to move the locating bar 81 to andfrom the shaft. The valve 98 controls the movements of the piston 45 toadvance and retract the cutting tool 38 relative to the adjacent end ofthe shaft and also controls the movements of the piston 84 to actuate'the locating bar 81 toward and f from the shaft. The valve 99 iseffective t control the movements of the piston 50 to advance andretract the' cutting tool 48 relative to thef adjacent end of the shaft.The valves 98 and; 99 are manually operable independently of eac'hlother t0 eifect simultaneous tool-advancing'or tool-retracting movementsof the pistons 45 and 58 or to effect selective movements of thepistonsfor retracting one of the tools from cutting en'- gagement with theadjacent end of the shaft while the other tool is advancing in cuttingengagement with the other end of the shaft.

In the position of the tool valve bodies |00 and |8| of the valves 98and 99, respectively, shown in Fig. 6, the valve bodies |88 and 8| havebeen moved to the right `to control the pres-l sure fiuid from theconduits 96 and 91 to effect simultaneous actuation ofthe pistons 45 and50- in their cylinders 46 and 5|, respectively, to re tract the toolsfrom cutting engagement with Y the shaft at the end of the cutting andcentering operation shown in Fig. 2 to their initialV inactive positionsshown in Fig. 1 and also to effect operation 0f the piston 84 in thecylinder 83 to move the locating bar 81 from its retracted position toits shaft-engaging position. Referring first to the position of thevalve body |88 of the valve 98, it will be seen that the flow ofpressure fluidv from the conduit 96 is directed through the valvepassage |82 to the conduit |83, branch conduit |84, through passage |85of vthe speed-control valve |86 wherein valve body |81 is raised by aspring I 88 to allow flow around a reduced portion of said body |81 toconduit |35, and which valve |06 also comprises a branch passage |89 fortheI fluid which fluidV under pressure is effective to raise the checkvalve II8 against the pressure of its spring III to allow flow of theui'd to passage ||2, spaced from the valve body |81, to the passage |85and thence to the cylinder 46 by the conduit I i3, to effect rearwardmovement of the piston 45 and piston rod 44 therein t'o withdraw thetoolv 30 and maintain it in its inactive position. The fluid evacuatedfrom'theA cylinder 46 by the rearward movement of 'the' piston 445 flowsthrough the conduits 4 and |15 t0 the valve passages |16 and II1 and tothe return conduit |I8 leading to the sump 93.

It may be noted that, in the described hydraulicl circuit, the conduit I83 has a branch conduit ||9 having a manually operable valve |28 in openposition to allow the flow of the iiuid't'o* the cylinder 83 to move thepiston 84 thereby the work-locating bar 81 toward its shaft-engag-f ingposition, the fluid expelled from the cylinder 83by the aforesaidmovement of thelpiston 84 o'wing through the conduit |2| to conduit I |4to the conduit I|5 which is connected as previously described to thesump 93. v f l*To advance thechuck I5 and its tool 30 to cuttingengagement with the adjacent end of the shaft l, the `valve body |88 yismoved to the lett te direetetheenowon the;4 pressure.:` duid-td:

.anni ".thespist.orr;.45. te. .actuate.=.-the same.,y th.inressureefluiddirent;theepuiripI and; conduit...

iilowingfn througlrithee passage I.I 6,-.-by;,- reason Qilhe changedposition-foi.y theevalvezV bodyi and. themertof .-thefconduits; I.I 5.and I. id to. theeylin-f den#tif-tozgactuatexthe :piston-'45, and .thepiston redfzzd -vto--mcveethe chuckryt5-. andfits tool- 30 millardsandi-f into` cuttingi;engasement.-.l with f ther. shafts-'llogf-permitrthe; chuck.' I 5;. and its.- tool 30 Ato lbe qn-iclrlymoved. towardthe end of; the-shaftand. thereaftereV to rr1ove.slowlyinfto;V cuttingy engage-` ment, v4veit-h thez shatg: andfalso'-during; the; cut.- v ting.onerations,.ap.cam .Ypvlate; |221.is,..suitably,- ser. 15 Quited .the movableferaclergf, by;means..Y of:4ai. m@tintinailfliemhere.I23,;gar1d,V bolt and; nu.t..-:assenti,A blies|24. and; vL2 theamplateri ZfZsbeingf; adaptf'fv4 edf, teeactuateqthelsnee.dffcontrclvalve IBG-itcVr achieve. .this desirable. result in -amanner nowtogfhef. deseribed.: Referring toV Figs. 3 ancl- 5, it.wil-1;. be-.-'noted-..that. Ythe valve. 'I Ge is secured. to.Vatedowrrwardlv extending; vportion ofy the; head-l steekefzbyabolts;{2e-fand;- I2I so; that.. the-roller. 28 on thefvalve bed-yIef'tfofithevalve- Ii, engagessthefbottom ofthescamplate'. I22; mountedonathefmovablemacks In the positionof the.l various:fluid-operatedandduid-control. means illustrated Fig.` 6, v.and priorito. the actuation--o...the valvefbody.fII10.-of the v alveeV to the right-.to:"direct;v4the.- now of-'fluidthrough the conduit 11.4: to. ythe piston 45 to'vactuate the same to engage fthestool 30 .with the shaft, the valve-body`ID-TIei-'the `valve Ii is'inl its open positiomtofallovwfree lflow ofthe pressure fluid fromY the: cylinder 46.r through .Y the passage: I D5ofi-.the .valve |06. to 1the :sump Upon movement of. thevalve-:fbodylimito the right to direct the. now-or. the. pressure iiuifd totl-i.e..rear.o` the pis ten cl5 .to fadvanve the-'tool ..39 .totshaft-engaging position.theahorizontalportion L29 of thev cam'p1ate.-I.2.2.-; willrbefineiective .to actuate-V thev valve bodyfIG-Ito. restrict: theifreeffloW-.of 4'the pressure uidthroughtheapassage I-.otftheA valve HB5, andftheepiston 45a will. rapidly advance the tool.ftoivardfthesadjacent. endof thev shaft; How-V evers,` as; the roller't28 .fengagesethe inclined cam portiorr` ISB andhorizontal' portion.I3I of the plate:` I22s,'jl the val/ve body I2] Will be' rapidly moveddownward against 'the action ofrits spring I08 =to1fcutoi thefloW-"ofthe pressure uid through .the passagefIU'f to: the sump and thefludwill; thereupon flewfthrough the passage-zV I.-I;2..a-nd,as.thesP-nggml I4 I. andthe fluid.v pressure has `urged; the; cheek-valve.I; Iftoxi its .closed '.pgsief tionthefnuidfw-l-lbeconstrained-.to newthrough ther-small; openings I-3.2"in=. the valve l. Iilifand into.thespassagefISfO-f the-valve Iiliiv tolthe conduit. Ira'land; meren-mp,,K the zpractical.- effect0 of; this. phasea-ot-operatien ofi. the.valve. I'EIG being to 60:vv restrict fthe, f-ree flew'ofwthe fluid fronrthe. cylin- Y der-46ftof=check the rapid advancewto the pistonandfthereby: to advance the'toolr@ slowly. into ffinitialscuttingengagementpwith the.y shaft. and fdurinagthefcutting; operation..l

'Theffpositionof,- the valve body Iiilof the. valvedadn.its,tool-advancing Yposition as above describedis:alsofinstrumentalato-eiect flowv ofA the pressurefflud tothe cylinder.83through the conduitsI-Ig, conduits' IIe-and. I2YI to; cause the 70`piston-:8.11am "the `cylinder 3S 'to retract. the. locating bar 81 fromengagement'.witmthegendof; the. .shaft-:rf the fluid expelled; from.:theseylnder by, the-movement Qrthefrpistonf. de.wing;througn QQndJiietLlititorthezconduit; I dBi-iand-passagg- 75" 8. Irl-8xtdzthe.sum-pr,yThesurfaceslz, [311 andji. of.-the.-cam.plate I22. are proportioned insuch.. mannerW-ith respecttoeach other thatthe valve. v body- I28- ofthe valve. I Will beactuated to.

close. the passage. M35-in the valveIIlS. toretard..

movementof the piston .and thereby thetool before thetoolissuiiicientlyl advanced to en. gage .the locatingV bar 81 so `thatthe latter will. be withdrawn completely from the. shaft at the. time.the tool approaches. the shaft to.. begin. cutting andV centering. ofthe adjacent shaft end-.

The hydraulic. systemior advancing and rer. tracting thechuck'l-.anditstool Staand from cutting. engagement. with the. adjacent endof. the. shaft is.; similarto. that. describedor .ob.taining.similar-movements; of. the chuck I5 and.. its;- teolssi asswillbe. apparent..frorro. an..inspeceA tion of Eig 6, Considering..the.,hydrau1i.e sys-- tem..1".or the ..tool 4.8the -Valve..9 9, as4previously described. is,- instrumental to control` the` ilow.-of-thepressure luidfrom the .pumpto thepiston. 5e to, reciprocate,thesarne to. advance `andrefL tractthe. tool.. Itwill benotedthat, inFig, 6g, the valve body. of thefvalveihas been..moved.. tothe;-right..whereby the .pressure fluid is, operative to` maintainthe..piston 45 .inits toolf retreating.. position, .the-.pressure iluid,ovvingA from the. 4 pump.. throughthe conduit.` ilI` to the. valve`passage 13.3. ofthe. vali/edd, conduit I34.,. and through the.sp.eed:controlvalve |35; identical Withvalve. Idd and Athereby allowingfree. dow. of the uidinasmuch as. its valveA body,A |36. is Y.in itsvraised. positiontoA the.- conduit I3I. to the cylinder 51I.to the.pistonv iLthe uid eX- Y. pelled by the piston flowing. from the.cylinder 5.! throughtheconduit.. |38 to the.v passages |39. and. IAG inthe. valve 99. to..the..conduit, I4I connected to. the. sump,

Upon movement .of the valve body IGI `of the valve 99. tothe lefttodirect .the pressure. fluid to.. actuate. the pistontl. to .movethechuck Il] and tool t3y toward.. and intov cuttingengagement withthe.. adjacent f. end of theshaft, the pressure uid. will. be directed.from the con- Y. duiteltothe passage. I39,.of the valve 99 to the.

conduit. ISS. and. thefcylinder. 5I tri-exert pressure on piston 5Gandfmove the. sameforvvard to advance the tool I8 to. its shaft-cuttingand centering position. Due to the pressure ofthe uid. entering thecylinder. 5i Afrom the conduit ISB,l the pistonewill expel the fluid atthe leftv thereof in` the cylinder tol thev conduit |31Y and valve`i375, which valve perm-itsthe. free new of the.. huid to` allow. the.rapid movement. of. the.

s piston. B.- and therebythe-tool ll'toward the.

adjacent endroi; the. shaftuntlVV thel cam por tion-IM;n of the camplate 11113,` mounted on-the.- racka andfsimilar to that; of the. camplatef- IZZ on the raclr- 39, engages theroller Ulli-of; the valveAvbody |326: At' this time: the valve body' E3wi1lrbe`urged ydovnvvardlybythe cam plateV to, reduce the -flovv-ofy luidthrough the valve-i3d tosubstantiallydecreasethe speed of travel of the piston 5] and therebythe` tool'.- li into;V cutting` engagerneni',y and during suchengagement .With vthe adj-acentendof theshaft. Upon. the.passagey v.of lthe fluid` .through .the valve I-35.,.;theiluidwill flow through'theconduit. |35,- the passages-lfandfilli of the valve; 9-, to the conduit.Uil, and the-sumpv 93. It will beV seen fromy the. foregoingV that-thegrinstrumentalities and f. operation of.l thefhydraulic system.Y forthe advancement andretraetion; of. the:cutting and centering vftool.:4;3 is identical; to-fthat of. the. hy-V`- draulic'systemiorvtheoperation. yof the tool- 30..

Asition. 4

pageant@ -The cuttingand centering tool 30 shown in andthe machineivcanthen be utilized to merely center the shaft. In such case, the necessityAfor utilizing the shaft-locatingbar is dispensed with and it may beretained in itsretracted' position by disconnecting` the cylinder efromthe conduit H9 by operating' the valve. |20 to prevent the flow ofpressure fluid to the cylinder .83, and actuation of the piston 84tofadvanc'e thelocating bar 8l to its shaft-engaging po- It will beapparent from the foregoing des-criptionthat inasmuch as the valvebodies ,|60 and of the valves 93 and 99, respectivelycon trolling theoperation ofthe tools fa'nd 48, v lare independently operable that bothof the vtools may be simultaneously moved to shaft-cutting and centeringposition and alsoretracted from suchjposition `and also that the toolsmay be selectively operated independently of the other. -Bycontrollingthe movement of the tools independently of each other, each end of ashaft may be processed Without reference to the other so that theshaftwill'becut to a predetermined desired .length with considerableaccuracy and "anotheends ofthe shaft win be centered satisfactorily.k Animportant advantage is obtained by the hydraulic speed-control valveseffecting the rapid advance of the tools toward their cutting andcentering position adjacentl 4the 4ends :of theshaft and thereafterslowly moving the tools into: and ,during their `cutting and-.centeringengagement with ,the4 shaft, these operations l considerably expeditingAthe, cutting and*4 centering of the `shaftends while insuringsatisfactory A,performance of .thegtoolsr and prolonging their usefullife: It will be apparent that the shaftlocating function of the machineis of considerable value in accurately positioning the shaft Y betweenthe tools substantially eduidistant therefrom whereby the ends of theshaft will be operated on' by the tools for an equal proportionateamount of time thus permitting the processing of a substantial amount ofshafts within a short period.

While the embodiment of the invention herein disclosed constitutes apreferred form, it is to be understood that other forms might beadopted, all coming within 'the scope of the claims which follow.

We claim:

1. In a machine for cutting the ends of shafts of different lengths toprovide shafts of uniform length, shaft support for fixedly holding ashaft in cutting position, cutting heads including rotary cutting toolspositioned adjacent said support and each being movable along an axisaligned with the axis of said shaft from a retracted positionV towardsaid support to an advanced position wherein said tools engagerespective ends of a shaft mounted on the support, a locating membermovable from an .advanced position,` wherein it is in the path ofmovement of said cutting tools and wherein it determines the cuttingYposition of a shaftplaced on said support by forming an abutmentagainst which an yend cof the shaft is adapted to be placedV to aretracted position, hydraulic motor operatively connected to saidlocating member for moving the same, hydraulic motors operativelyconnected to said cutting heads. for moving the latter, a pump providinga source of motive uid for said motors,

a `control valve connected to said pump and one of the motors for movingone of the cutting heads., acontrol valve connected to said pump and themotor connected to the locating member and the other motor connected totheother cutting head and operable in one position thereof to direct theiiuid to actuate the motor which controlsthe movements of said locatingmember,

4to maintainthe latter in its advanced position `and to actuate theother motor, which controls the movements of said other cutting head, to

maintain the latter in its vretracted position, said valve beingoperable when moved to another Vposition thereof to direct the fluid toac- .tuate ,said first-mentioned motor to retract said locating memberand thereafter to vdirect the fluid to actuate said other motor to movethe other cutting head to its advanced position, said first-mentionedcontrol valve being operable independentlylof said second-mentionedcontrol valve to direct fluid to actuatesaid one cutting head to itsadvance position, and means for continuously rotating said cuttingtools.

ytool engages `one endof a shaft mounted on the support, a locatingmember movable from an advancedposition, wherein itis in the path ofmovement of said vcutting tool and wherein it determines the cuttingposition of a shaft placed `on said support by forming an Vabutmentagainst which an end of the shaftis adapted to `be placed,

vto a retracted position, an hydraulic motor operatively connected tosaid locating `member for moving the same, an hydraulic motoroperatively connected tolsaid cutting head for moving the 1 latter, apump providing a source of motiveuid for said motors, a control valveconnected to said pump and motors and operable in one position thereofto direct the fluid from the pump to actuate the motor which controlsthe movements of said locating member to maintain the latter in itsadvanced position and to actuate the motor which controls the movementsof said cutting head to maintain the latter in its retracted position,said valve being operable when moved to another position thereof todirect the fiuid from the pump to actuate said first-mentioned motor toretract said locating member and thereafter to actuate saidsecond-mentioned motor to move the cutting head to its advanced orshaft-engaging position, a speed control valve operatively connected tosaid control valve and to the motor, which controls the movements ofsaid cutting head, and operable in one position thereof to permit freeflow of motive fluid to said latter motor and effect full speedoperation thereof, said speed control valve being operable in anotherposition thereof to restrict the flow of motive fluid to said lattermotor and effect a slower speed thereof, means operable upon actuationof said latter motor for controlling the movements of said speed controlvalve, and.

tool.

3. In a machine for cutting the Aends lof shafts, `a shaft support, acuttingl head rincluding a rotary cutting tool positioned adjacent lsaidsupment against whichan end 4ofthe shaft'is adapted to be placed, Ato aretracted position, anhydrau- 'licmotor includinga cylinder andpiston'therein,

means operativelyconnecting said piston toV said .locating means forYmoving the latter, Va second vhydraulic `motorincluding a `cylinder anda piston, means operatively connecting said latter piston to saidcutting head for moving the latter, fa v source of motive .uid ,for saidmotors, "means Iproviding a pair of inlet and outletports for A each.cylinder on .opposite ,sides of "its respec- Etive piston, a controlvalve connected to said source and to said V,inlet and outlet' ports.and Iforperablein one position thereof to admit/motive .fluid to ,saidfirst-mentioned cylinder :to4 move its piston in a direction tov advancesaid locating member and simultaneous lytoadmit motiveflud .to lsaid.second-mentioned V cylinder to move 'its piston ,in ,a direction toretract 'the cuttinghead fsaid valve being operable Whenmovedlto anotherposition thereof to admit motive'fluid 4tosaid `firstmentioned cylinderto move its piston Aina direction to retract said"loc ati ng member Yandthereafter to admit motive fluid rto said-second- -mentioned cylinder tomove its pistonin aV directo v'permit tfree ow bcnf-motivev `iiuiditlrrough- -the valve assembly and thereby the cylinderto kei?- VfeetArapid travel of the -cutter head lfrom the shaft aftercutting of theshaftbyrthe cutting tool, means operable xunder the v`controlfofmovement ofthe piston, associated with-said'ssecond- `mentionedcylinder, for 'controllingfthe fmcve- -ments 'of said speed lcontrolvalve, and-means 'for continuously rotating v'said 'cutting tool.

14. -In a'machineffor cutting the'ends ofshafts Aof Vdifferent lengths-to provide shaftsfo'f uniform length, a stationary shaft support;vfluidffpressure actuated 'cutter-carryingfslidespositioned/at :oppositeends ,ofY sai-d shaftsupport iandiindependently movable along anaxis,alignedv with the axis of said `shaft Icarried-:by saidsupport, to.engage -the ends voli-they shaft 'carried ibysaid support; auidpressure actuatedlocating stop vmovable'transversely of the axisofthe shaft Lto engage and position `one end of -the's'haftgja`predetermined distance 'from one lof the'slides; -a source of supplyofvhydraulic fluid underrpressure 'for operating saidslidesfand'locating stop; a 'rst valve for controllingftheflow-ouidmnder pressurelfrom said source ofsupply to -said iiuid pressure operated locating'stop and l'to fone-of said `fluid pressure 4operated :slidesyanda Ysec-.ond valve for controllingthe 'flow of `uid under pressure ,from saidsourceofsupplylto lthe other of said fluid pressure 'operated slides.

'HAR-RY *NOBLE BANEY. LOUIS 'ALLEN- "COPPERlLSIENT-Z. ARLO ALMERONlfKIRKPA'IRIGK.

REFERENCES SCITED The following references arev of record' iin-the .leof this patent:

' UNITED STATES vl?A'IENTS Number Name Date 680,724 Mussetter etial.lAug. 120, 1901 1,787,781 Galloway ;Jan. 16,' '1931 1,813,040 FerrisJuly 7 '1931 '1,905,133 'Bishop et al 'Apr.. 25, 1933 1,954,920 DamerellApr. l1.7, vv193i 1,972,595 Libby :Sept 4, 1934 2,545,344 'Crawford/etal=1\/l2ar.'13,v .195,1

